scan-x11.c

#include <stdio.h>

#include <X11/XKBlib.h>
#include <X11/extensions/record.h>

#include "buckle.h"

void key_pressed_cb(XPointer arg, XRecordInterceptData *d);

int scan(int verbose)
{
	/* Initialize and start Xrecord context */
	
	XRecordRange* rr;
	XRecordClientSpec rcs;
	XRecordContext rc;

	printd("Opening Xrecord context");

	Display *dpy = XOpenDisplay(NULL);
	if(dpy == NULL) {
		fprintf(stderr, "Unable to open display\n");
		return -1;
	}
    
	rr = XRecordAllocRange ();
	if(rr == NULL) {
		fprintf(stderr, "XRecordAllocRange error\n");
		return -1;
	}

	rr->device_events.first = KeyPress;
	rr->device_events.last = ButtonReleaseMask;
	rcs = XRecordAllClients;

	rc = XRecordCreateContext (dpy, 0, &rcs, 1, &rr, 1);
	if(rc == 0) {
		fprintf(stderr, "XRecordCreateContext error\n");
		return -1;
	}

	XFree (rr);

	if(XRecordEnableContext(dpy, rc, key_pressed_cb, NULL) == 0) {
		fprintf(stderr, "XRecordEnableContext error\n");
		return -1;
	}

	/* We never get here */

	return 0;
}


/*
 * Xrecord event callback
 */

void key_pressed_cb(XPointer arg, XRecordInterceptData *d) 
{
	if (d->category != XRecordFromServer)
		return;
    
	int key = ((unsigned char*) d->data)[1];
	int type = ((unsigned char*) d->data)[0] & 0x7F;
	int repeat = d->data[2] & 1;

	key -= 8; /* X code to scan code? */

	if(!repeat) {

		switch (type) {
			case KeyPress:
				play(key, 1);
				break;
			case KeyRelease:
				play(key, 0);
				break;
			case ButtonPress:
				if(key == -5 || key == -7)
					printf("%d\n", key);
				break;
			case ButtonRelease:
				if(key == -5 || key == -7)
					play(0xff, 0);
				break;
			default:
				break;
		}
	}

	XRecordFreeData (d);
}


void open_console(void)
{
}